I recently bought a PowerShot S100, and I have noticed that most photos show thin lines (white, purple and green) in zones of contrast. You can see an example in the attached pictures. It is not exactly color aberration (it's not purple or green fringing); it looks more like pixel bleeding due to over-exposition. However, I have played with the exposure and I have only managed to partially mitigate the problem. Do you think it could be a defect in the sensor?